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Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.
gRPC-Go is the Go language implementation of gRPC. Prior to 1.83.1, internal/transport/transport.go stores each fragmented HTTP/2 DATA frame as a separate recvMsg in recvBuffer, so millions of one-byte frames can consume disproportionate heap memory even when payload bytes remain within connection and stream flow-control windows. An unauthenticated remote attacker can use concurrent multiplexed streams to exhaust process memory and cause a runtime panic or out-of-memory termination. Receive-buffer compaction is enabled by default and can be controlled temporarily with GRPC_GO_EXPERIMENTAL_ENABLE_RECEIVE_BUFFER_COMPACTION. This issue is fixed in version 1.83.1.
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{
"vendor": "grpc",
"product": "grpc-go",
"versions": [
{
"version": "< 1.83.1",
"status": "affected"
}
]
}Original source record · Cite this exact observation · Complete original publisher JSON